import re

s = ('<div id="post_content_149764117078" class="d_post_content j_d_post_content " style="display:;">                  '
     '  求大佬帮助<img class="BDE_Image" '
     'src="http://tiebapic.baidu.com/forum/w%3D580/sign=b437bac33dcb0a4685228b315b62f63e'
     '/a535e5dde71190efce02cae6881b9d16fdfa600a.jpg?tbpicau=2024-02-13-05_a9cd71ecc089e40be2024d41b09f755c" '
     'size="136926" changedsize="true" width="560" height="676"><img class="BDE_Image" '
     'src="http://tiebapic.baidu.com/forum/w%3D580/sign=c5ca61fa91ca7bcb7d7bc7278e086b3f'
     '/f5628535e5dde711272b1bcfe1efce1b9d16610a.jpg?tbpicau=2024-02-13-05_6ff4265ab1190a4cc6b09c5d8d66f2fd" '
     'size="86829" changedsize="true" width="560" height="602"><img class="BDE_Image" '
     'src="http://tiebapic.baidu.com/forum/w%3D580/sign=f5e764fed6529822053339cbe7cb7b3b'
     '/0f2eb9389b504fc266a6e83ca3dde71190ef6d0a.jpg?tbpicau=2024-02-13-05_22cd5aeef76e577600af9e798c4faaa6" '
     'size="68972" changedsize="true" width="560" height="497"></div>')
p = r'<img.*?src="(.*?)".*?>'
m = re.findall(p, s)
print(m)

